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+page.title=Installing the SDK
+
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+</style>
+
+<div id="qv-wrapper">
+<div id="qv">
+
+  <h2>In this document</h2>
+  <ol>
+    <li><a href="#Preparing">1. Preparing Your Development Computer</a></li>
+    <li><a href="#Installing">2. Downloading the SDK Starter Package</a></li>
+    <li><a href="#InstallingADT">3. Installing the ADT Plugin for Eclipse</a></li>
+    <li><a href="#AddingComponents">4. Adding Platforms and Other Packages</a>
+      <ol>
+        <li><a href="#components">Available Packages</a></li>
+        <li><a href="#which">Recommended Packages</a></li>
+      </ol></li>
+    <li><a href="#sdkContents">5. Exploring the SDK (Optional)</a></li>
+    <li><a href="#NextSteps">Next Steps</a></li>
+    <li><a href="#troubleshooting">Troubleshooting</a></li>
+  </ol>
+
+<h2>See also</h2>
+  <ol>
+    <li><a href="{@docRoot}tools/sdk/eclipse-adt.html">ADT Plugin for Eclipse</a></li>
+    <li><a href="{@docRoot}sdk/exploring.html">Exploring the SDK</a></li>
+  </ol>
+
+</div>
+</div>
+
+<p>This page describes how to install the Android SDK
+and set up your development environment for the first time.</p>
+
+<p>If you encounter any problems during installation, see the
+<a href="#troubleshooting">Troubleshooting</a> section at the bottom of
+this page.</p>
+
+<h4>Updating?</h4>
+
+<p>If you already have an Android SDK, use the Android SDK Manager tool to install
+updated tools and new Android platforms into your existing environment. For information about how to
+do that, see <a href="{@docRoot}sdk/exploring.html">Exploring the SDK</a>.</p>
+
+
+<h2 id="Preparing">Step 1. Preparing Your Development Computer</h2>
+
+<p>Before getting started with the Android SDK, take a moment to confirm that
+your development computer meets the <a href="requirements.html">System
+Requirements</a>. In particular, you might need to install the <a
+href="http://java.sun.com/javase/downloads/index.jsp">JDK</a>, if you don't have it already. </p>
+
+<p>If you will be developing in Eclipse with the Android Development
+Tools (ADT) Plugin&mdash;the recommended path if you are new to
+Android&mdash;make sure that you have a suitable version of Eclipse
+installed on your computer as described in the
+<a href="requirements.html">System Requirements</a> document.
+If you need to install Eclipse, you can download it from this location: </p>
+
+<p style="margin-left:2em;"><a href=
+"http://www.eclipse.org/downloads/">http://www.eclipse.org/downloads/</a></p>
+
+<p>The "Eclipse Classic" version is recommended. Otherwise, a Java or
+RCP version of Eclipse is recommended.</p>
+
+
+<h2 id="Installing">Step 2. Downloading the SDK Starter Package</h2>
+
+<p>The SDK starter package is not a full
+development environment&mdash;it includes only the core SDK Tools, which you can
+use to download the rest of the SDK packages (such as the latest Android platform).</p>
+
+<p>If you haven't already, get the latest version of the SDK starter package from the <a
+href="{@docRoot}sdk/index.html">SDK download page</a>.</p>
+
+<p>If you downloaded a {@code .zip} or {@code .tgz} package (instead of the SDK installer), unpack
+it to a safe location on your machine. By default, the SDK files are unpacked
+into a directory named <code>android-sdk-&lt;machine-platform&gt;</code>.</p>
+
+<p>If you downloaded the Windows installer ({@code .exe} file), run it now and it will check
+whether the proper Java SE Development Kit (JDK) is installed (installing it, if necessary), then
+install the SDK Tools into a default location (which you can modify).</p>
+
+<p>Make a note of the name and location of the SDK directory on your system&mdash;you will need to
+refer to the SDK directory later, when setting up the ADT plugin and when using
+the SDK tools from the command line.</p>
+
+
+<h2 id="InstallingADT">Step 3. Installing the ADT Plugin for Eclipse</h2>
+
+<p>Android offers a custom plugin for the Eclipse IDE, called Android
+Development Tools (ADT), that is designed to give you a powerful, integrated
+environment in which to build Android applications. It extends the capabilites
+of Eclipse to let you quickly set up new Android projects, create an application
+UI, debug your applications
+using the Android SDK tools, and even export signed (or unsigned) APKs in order
+to distribute your application. In general, developing in Eclipse with ADT is a
+highly recommended approach and is the fastest way to get started with Android.
+</p>
+
+<p>If you'd like to use ADT for developing Android applications, install it now.
+Read <a href="{@docRoot}tools/sdk/eclipse-adt.html#installing">Installing the ADT Plugin</a> for
+step-by-step installation instructions, then return here to continue the
+last step in setting up your Android SDK.</p>
+
+<p>If you prefer to work in a different IDE, you do not need to
+install Eclipse or ADT. Instead, you can directly use the SDK tools to build and
+debug your application. The <a href="{@docRoot}tools/workflow/index.html">Introduction</a>
+to Android application development outlines the major steps that you need to complete when
+developing in Eclipse or other IDEs.</p>
+
+
+
+<h2 id="AddingComponents">Step 4. Adding Platforms and Other Packages</h2>
+
+<p>The last step in setting up your SDK is using the Android SDK Manager (a
+tool included in the SDK starter package) to download essential SDK packages into your development
+environment.</p>
+
+<p>The SDK uses a modular structure that separates the major parts of the SDK&mdash;Android platform
+versions, add-ons, tools, samples, and documentation&mdash;into a set of separately installable
+packages. The SDK starter package, which you've already downloaded, includes only a single
+package: the latest version of the SDK Tools. To develop an Android application, you also need to
+download at least one Android platform and the associated platform tools. You can add other
+packages and platforms as well, which is highly recommended.</p>
+
+<p>If you used the Windows installer, when you complete the installation wizard, it will launch the
+Android SDK Manager with a default set of platforms and other packages selected
+for you to install. Simply click <strong>Install</strong> to accept the recommended set of
+packages and install them. You can then skip to <a href="#sdkContents">Step 5</a>, but we
+recommend you first read the section about the <a href="#components">Available Packages</a> to
+better understand the packages available from the Android SDK Manager.</p>
+
+<p>You can launch the Android SDK Manager in one of the following ways:</p>
+<ul>
+  <li>From within Eclipse, select <strong>Window &gt; Android SDK Manager</strong>.</li>
+  <li>On Windows, double-click the <code>SDK Manager.exe</code> file at the root of the Android
+SDK directory.</li>
+  <li>On Mac or Linux, open a terminal and navigate to the <code>tools/</code> directory in the
+Android SDK, then execute: <pre>android</pre> </li>
+</ul>
+
+<p>To download packages, use the graphical UI of the Android SDK
+Manager to browse the SDK repository and select new or updated
+packages (see figure 1). The Android SDK Manager installs the selected packages in
+your SDK environment. For information about which packages you should download, see <a
+href="#which">Recommended Packages</a>.</p>
+
+<img src="/images/sdk_manager_packages.png" />
+<p class="img-caption"><strong>Figure 1.</strong> The Android SDK Manager's
+<strong>Available Packages</strong> panel, which shows the SDK packages that are
+available for you to download into your environment.</p>
+
+
+<h3 id="components">Available Packages</h3>
+
+<p>By default, there are two repositories of packages for your SDK: <em>Android
+Repository</em> and <em>Third party Add-ons</em>.</p>
+
+<p>The <em>Android Repository</em> offers these types of packages:</p>
+
+<ul>
+<li><strong>SDK Tools</strong> &mdash; Contains tools for debugging and testing your application
+and other utility tools. These tools are installed with the Android SDK starter package and receive
+periodic updates. You can access these tools in the <code>&lt;sdk&gt;/tools/</code> directory of
+your SDK. To learn more about
+them, see <a href="{@docRoot}tools/index.html#tools-sdk">SDK Tools</a> in the
+developer guide.</li>
+
+<li><strong>SDK Platform-tools</strong> &mdash; Contains platform-dependent tools for developing
+and debugging your application. These tools support the latest features of the Android platform and
+are typically updated only when a new platform becomes available. You can access these tools in the
+<code>&lt;sdk&gt;/platform-tools/</code> directory. To learn more about them, see <a
+href="{@docRoot}tools/index.html#tools-platform">Platform Tools</a> in the
+developer guide.</li>
+
+<li><strong>Android platforms</strong> &mdash; An SDK platform is
+available for every production Android platform deployable to Android-powered devices. Each
+SDK platform package includes a fully compliant Android library, system image, sample code,
+and emulator skins. To learn more about a specific platform, see the list of platforms that appears
+under the section "Downloadable SDK Packages" on the left part of this page.</li>
+
+<li><strong>USB Driver for Windows</strong> (Windows only) &mdash; Contains driver files
+that you can install on your Windows computer, so that you can run and debug
+your applications on an actual device. You <em>do not</em> need the USB driver unless
+you plan to debug your application on an actual Android-powered device. If you
+develop on Mac OS X or Linux, you do not need a special driver to debug
+your application on an Android-powered device. See <a
+href="{@docRoot}tools/device.html">Using Hardware Devices</a> for more information
+about developing on a real device.</li>
+
+<li><strong>Samples</strong> &mdash; Contains the sample code and apps available
+for each Android development platform. If you are just getting started with
+Android development, make sure to download the samples to your SDK. <!--The download
+includes not only a set of very useful sample apps, but also the source for <a
+href="{@docRoot}training/basics/firstapp/index.html">Building Your First App</a> and other
+tutorials. --></li>
+
+<li><strong>Documentation</strong> &mdash; Contains a local copy of the latest
+multiversion documentation for the Android framework API. </li>
+</ul>
+
+<p>The <em>Third party Add-ons</em> provide packages that allow you to create a development
+environment using a specific Android external library (such as the Google Maps library) or a
+customized (but fully compliant) Android system image. You can add additional Add-on repositories by
+clicking <strong>Add Add-on Site</strong>.</p>
+
+
+<h3 id="which">Recommended Packages</h3>
+
+<p>The SDK repository contains a range of packages that you can download.
+Use the table below to determine which packages you need, based on whether you
+want to set up a basic, recommended, or full development environment:
+</p>
+
+<table style="width:95%">
+
+<tr>
+<th>Environment</th>
+<th>SDK&nbsp;Package</th>
+<th>Comments</th>
+</tr>
+
+<tr>
+<td rowspan="3" style="font-size:.9em;background-color:#FFE;">Basic</td>
+<td style="font-size:.9em;background-color:#FFE;">SDK Tools</td>
+<td style="font-size:.9em;background-color:#FFE;">If you've just installed
+the SDK starter package, then you already have the latest version of this package. The
+SDK Tools package is required to develop an Android application. Make sure you keep this up to
+date.</td>
+</tr>
+
+<tr>
+<td style="font-size:.9em;background-color:#FFE;">SDK Platform-tools</td>
+<td style="font-size:.9em;background-color:#FFE;">This includes more tools that are required
+for application development. These tools are platform-dependent and typically update only when
+a new SDK platform is made available, in order to support new features in the platform. These
+tools are always backward compatible with older platforms, but you must be sure that you have
+the latest version of these tools when you install a new SDK platform.</td>
+</tr>
+
+<tr>
+<td style="font-size:.9em;background-color:#FFE;">SDK platform</td>
+<td style="font-size:.9em;background-color:#FFE;">You need to download <strong
+style="color:red">at least one platform</strong> into your environment, so that
+you will be able to compile your application and set up an Android Virtual
+Device (AVD) to run it on (in the emulator). To start with, just download the
+latest version of the platform. Later, if you plan to publish your application,
+you will want to download other platforms as well, so that you can test your
+application on the full range of Android platform versions that your application supports.</td>
+</tr>
+<tr>
+<td colspan="2"
+style="border:none;text-align:center;font-size:1.5em;font-weight:bold;">+</td><td
+style="border:none"></td>
+</tr>
+<tr>
+<td rowspan="3">Recommended<br/>(plus Basic)</td>
+<td>Documentation</td>
+<td>The Documentation package is useful because it lets you work offline and
+also look up API reference information from inside Eclipse.</td>
+</tr>
+
+<tr>
+<td>Samples</td>
+<td>The Samples packages give you source code that you can use to learn about
+Android, load as a project and run, or reuse in your own app. Note that multiple
+samples packages are available &mdash; one for each Android platform version. When
+you are choosing a samples package to download, select the one whose API Level
+matches the API Level of the Android platform that you plan to use.</td>
+</tr>
+<tr>
+<td>Usb Driver</td>
+<td>The Usb Driver package is needed only if you are developing on Windows and
+have an Android-powered device on which you want to install your application for
+debugging and testing. For Mac OS X and Linux platforms, no
+special driver is needed.</td>
+</tr>
+<tr>
+<td colspan="2"
+style="border:none;text-align:center;font-size:1.5em;font-weight:bold;">+</td><td
+style="border:none"></td>
+</tr>
+<tr>
+<td rowspan="3">Full<br/>(plus Recommended)</td>
+<td>Google APIs</td>
+<td>The Google APIs add-on gives your application access to the Maps external
+library, which makes it easy to display and manipulate Maps data in your
+application. </td>
+</tr>
+<tr>
+<td>Additional SDK Platforms</td>
+<td>If you plan to publish your application, you will want to download
+additional platforms corresponding to the Android platform versions on which you
+want the application to run. The recommended approach is to compile your
+application against the lowest version you want to support, but test it against
+higher versions that you intend the application to run on. You can test your
+applications on different platforms by running in an Android Virtual Device
+(AVD) on the Android emulator.</td>
+</tr>
+
+</table>
+
+<p>Once you've installed at least the basic configuration of SDK packages, you're ready to start
+developing Android apps. The next section describes the contents of the Android SDK to familiarize
+you with the packages you've just installed.</p>
+
+<p>For more information about using the Android SDK Manager, see the <a
+href="{@docRoot}sdk/exploring.html">Exploring the SDK</a> document. </p>
+
+
+<h2 id="sdkContents">Step 5. Exploring the SDK (Optional)</h2>
+
+<p>Once you've installed the SDK and downloaded the platforms, documentation,
+and add-ons that you need, we suggest that you open the SDK directory and take a look at what's
+inside.</p>
+
+<p>The table below describes the full SDK directory contents, with packages
+installed. </p>
+
+<table>
+<tr>
+<th colspan="3">Name</th><th>Description</th>
+</tr>
+<tr>
+<td colspan="3"><code>add-ons/</code></td>
+<td>Contains add-ons to the Android SDK development
+environment, which let you develop against external libraries that are available on some
+devices. </td>
+</tr>
+<tr>
+<td colspan="3"><code>docs/</code></td>
+<td>A full set of documentation in HTML format, including the Developer's Guide,
+API Reference, and other information. To read the documentation, load the
+file <code>offline.html</code> in a web browser.</td>
+</tr>
+<tr>
+<td colspan="3"><code>platform-tools/</code></td>
+<td>Contains platform-dependent development tools that may be updated with each platform release.
+The platform tools include the Android Debug Bridge ({@code adb}) as well as other tools that you
+don't typically use directly. These tools are separate from the development tools in the {@code
+tools/} directory because these tools may be updated in order to support new
+features in the latest Android platform.</td>
+</tr>
+<tr>
+<td colspan="3"><code>platforms/</code></td>
+<td>Contains a set of Android platform versions that you can develop
+applications against, each in a separate directory.  </td>
+</tr>
+<tr>
+<td style="width:2em;"></td>
+<td colspan="2"><code><em>&lt;platform&gt;</em>/</code></td>
+<td>Platform version directory, for example "android-11". All platform version directories contain
+a similar set of files and subdirectory structure. Each platform directory also includes the
+Android library (<code>android.jar</code>) that is used to compile applications against the
+platform version.</td>
+</tr>
+<tr>
+<td colspan="3"><code>samples/</code></td>
+<td>Sample code and apps that are specific to platform version.</td>
+</tr>
+<tr>
+<td colspan="3"><code>tools/</code></td>
+<td>Contains the set of development and profiling tools that are platform-independent, such
+as the emulator, the Android SDK Manager, the AVD Manager, <code>ddms</code>,
+<code>hierarchyviewer</code>
+and more. The tools in this directory may be updated at any time using the Android SDK
+Manager and are independent of platform releases.</td>
+</tr>
+<tr>
+<td colspan="3"><code>SDK Readme.txt</code></td>
+<td>A file that explains how to perform the initial setup of your SDK,
+including how to launch the Android SDK Manager tool on all
+platforms.</td>
+</tr>
+<tr>
+<td colspan="3"><code>SDK Manager.exe</code></td>
+<td>Windows SDK only. A shortcut that launches the Android SDK
+Manager tool, which you use to add packages to your SDK.</td>
+</tr>
+<!--<tr>
+<td colspan="3"><code>documentation.html</code></td>
+<td>A file that loads the entry page for the local Android SDK
+documentation.</td>
+</tr>-->
+
+</table>
+
+
+<p>Optionally, you might want to add the location of the SDK's <code>tools/</code> and
+<code>platform-tools</code> to your <code>PATH</code> environment variable, to provide easy
+access to the tools.</p>
+
+
+<div class="toggleable closed">
+  <a href="#" onclick="return toggleDiv(this)">
+        <img src="{@docRoot}assets/images/triangle-closed.png" class="toggle-img" height="9px"
+width="9px" />
+        How to update your PATH</a>
+  <div class="toggleme">
+
+<p>Adding both <code>tools/</code> and <code>platform-tools/</code> to your PATH lets you run
+command line <a href="{@docRoot}tools/index.html">tools</a> without needing to
+supply the full path to the tool directories. Depending on your operating system, you can
+include these directories in your PATH in the following way:</p>
+
+<ul>
+
+  <li>On Windows, right-click on My Computer, and select Properties.
+  Under the Advanced tab, hit the Environment Variables button, and in the
+  dialog that comes up, double-click on Path (under System Variables). Add the full path to the
+  <code>tools/</code> and <code>platform-tools/</code> directories to the path. </li>
+
+  <li>On Linux, edit your <code>~/.bash_profile</code> or <code>~/.bashrc</code> file. Look
+  for a line that sets the PATH environment variable and add the
+  full path to the <code>tools/</code> and <code>platform-tools/</code> directories to it. If you
+  don't see a line setting the path, you can add one:
+  <pre>export PATH=${PATH}:&lt;sdk&gt;/tools:&lt;sdk&gt;/platform-tools</pre>
+  </li>
+
+  <li>On a Mac OS X, look in your home directory for <code>.bash_profile</code> and
+  proceed as for Linux. You can create the <code>.bash_profile</code> if
+  you don't already have one. </li>
+</ul>
+
+</div><!-- end toggleme -->
+</div><!-- end toggleable -->
+
+
+<h2 id="NextSteps">Next Steps</h2>
+<p>Once you have completed installation, you are ready to
+begin developing applications. Here are a few ways you can get started: </p>
+
+<p><strong>Set up the Hello World application</strong></p>
+<ul>
+  <li>If you have just installed the SDK for the first time, go to the <a
+  href="{@docRoot}training/basics/firstapp/index.html">Hello
+  World tutorial</a>. The tutorial takes you step-by-step through the process
+  of setting up your first Android project, including setting up an Android
+  Virtual Device (AVD) on which to run the application.
+</li>
+</ul>
+
+<p class="note">Following the Hello World tutorial is an essential
+first step in getting started with Android development. </p>
+
+<p><strong>Learn about Android</strong></p>
+<ul>
+  <li>Take a look at the <a href="{@docRoot}guide/index.html">Dev
+  Guide</a> and the types of information it provides.</li>
+  <li>Read an introduction to Android as a platform in <a
+  href="{@docRoot}guide/basics/what-is-android.html">What is
+  Android?</a></li>
+  <li>Learn about the Android framework and how applications run on it in
+  <a href="{@docRoot}guide/components/fundamentals.html">Application
+  Fundamentals</a>.</li>
+  <li>Take a look at the Android framework API specification in the <a
+  href="{@docRoot}reference/packages.html">Reference</a> tab.</li>
+</ul>
+
+<p><strong>Explore the development tools</strong></p>
+<ul>
+  <li>Get an overview of the <a
+  href="{@docRoot}tools/index.html">development
+  tools</a> that are available to you.</li>
+  <li>Read the <a href="{@docRoot}tools/workflow/index.html">Introduction</a> to Android
+application development.
+  </li>
+  <li>Read <a href="{@docRoot}tools/device.html">Using Hardware Devices</a> to learn
+how to set up an Android-powered device so you can run and test your application.</li>
+</ul>
+
+<p><strong>Follow the Notepad tutorial</strong></p>
+
+<ul>
+  <li>The <a href="{@docRoot}resources/tutorials/notepad/index.html">
+  Notepad Tutorial</a> shows you how to build a full Android application
+  and provides  helpful commentary on the Android system and API. The
+  Notepad tutorial helps you bring together the important design
+  and architectural concepts in a moderately complex application.
+  </li>
+</ul>
+<p class="note">Following the Notepad tutorial is an excellent
+second step in getting started with Android development. </p>
+
+<p><strong>Explore some code</strong></p>
+
+<ul>
+  <li>The Android SDK includes sample code and applications for each platform
+version. You can browse the samples in the <a
+href="{@docRoot}resources/index.html">Resources</a> tab or download them
+into your SDK using the Android SDK Manager. Once you've downloaded the
+samples, you'll find them in
+<code><em>&lt;sdk&gt;</em>/samples/<em>&lt;platform&gt;/</em></code>. </li>
+</ul>
+
+<p><strong>Visit the Android developer groups</strong></p>
+<ul>
+  <li>Take a look at the <a
+  href="{@docRoot}resources/community-groups.html">Community</a> pages to see a list of
+  Android developers groups. In particular, you might want to look at the
+  <a href="http://groups.google.com/group/android-developers">Android
+  Developers</a> group to get a sense for what the Android developer
+  community is like.</li>
+</ul>
+
+<h2 id="troubleshooting">Troubleshooting</h2>
+
+<h3>Ubuntu Linux Notes</h3>
+
+<ul>
+  <li>If you need help installing and configuring Java on your
+    development machine, you might find these resources helpful:
+    <ul>
+      <li><a href="https://help.ubuntu.com/community/Java">https://help.ubuntu.com/community/Java </a></li>
+      <li><a href="https://help.ubuntu.com/community/Java">https://help.ubuntu.com/community/JavaInstallation</a></li>
+    </ul>
+  </li>
+  <li>Here are the steps to install Java and Eclipse, prior to installing
+  the Android SDK and ADT Plugin.
+    <ol>
+      <li>If you are running a 64-bit distribution on your development
+      machine, you need to install the <code>ia32-libs</code> package using
+      <code>apt-get:</code>:
+      <pre>apt-get install ia32-libs</pre>
+      </li>
+      <li>Next, install Java: <pre>apt-get install sun-java6-jdk</pre></li>
+      <li>The Ubuntu package manager does not currently offer an Eclipse 3.3
+      version for download, so we recommend that you download Eclipse from
+      eclipse.org (<a
+      href="http://www.eclipse.org/downloads/">http://www.eclipse.org/
+      downloads/</a>). A Java or RCP version of Eclipse is recommended.</li>
+      <li>Follow the steps given in previous sections to install the SDK
+      and the ADT plugin. </li>
+    </ol>
+  </li>
+</ul>
+
+<h3>Other Linux Notes</h3>
+
+<ul>
+  <li>If JDK is already installed on your development computer, please
+  take a moment to make sure that it meets the version requirements listed
+  in the <a href="requirements.html">System Requirements</a>.
+  In particular, note that some Linux distributions may include JDK 1.4 or Gnu
+  Compiler for Java, both of which are not supported for Android development.</li>
+</ul>